Welcome to your 2365 624 Inspection & testing
1.
The easiest method of confirming polarity on a standard ring final socket outlet circuit is
2.
A polarity test should be carried out on the circuits of a new installation?
3.
One of the requirements for initial verification on a completed installation is
4.
Test probes to GS38 should amongst other considerations
5.
Specific regulations within the Electricity at Work Regulations state that they are absolute. What does that mean?
6.
If during an initial verification on an installation a continuity of cpc test gives erroneous results you should
7.
Several test instruments are used on an installation, which of the following may give a reading of 89MΩ;?
8.
Which of the following would NOT be acceptable for performing an insulation resistance test?
9.
The procedure for proving dead should be by use of a proprietary test lamp or two pole voltage detecting device as recommended by:
10.
BS7671 has a separate part designated solely to testing and inspection. The legal status of this document is that it is a
11.
What is the importance of verifying readings obtained with those listed within BS7671 and associated documents?
12.
GN3 recommends that a low resistance ohmmeter should have a range of
13.
Polarity can be tested prior to energising using a
14.
The reading in the picture was obtained during an insulation resistance test between phase, neutral and CPC. What might the result most likely mean?
15.
What is the formula for calculating earth fault loop impedance?
16.
A radial socket outlet circuit is supplied by a 2.5mm2 singles cable and is 20m long. Given that the Ze of the installation is 0.43ohms and the resistivity of each of the cables is 7.41m?/m at 20 degrees celsius, what is the Zs calculation expected to be without testing R1+R2 at 20 degrees celsius?
17.
Test leads according to GS38 should be
18.
In a medical location, the result of the resistance of the earth electrode and the rated residual operating current should not exceed
19.
When completing an EIC on a TNS system which box should be ticked in the means of earthing section
20.
Proof that a voltage device is working correctly is most safely achieved by
21.
During a periodic inspection, protective conductors must not be disconnected if
22.
The image represents which type of earthing system?
23.
Prior to performing an insulation resistance test you should
24.
The person resonsible for choosing the next inspection date on an EIC is
25.
The Electricity at Work Regulations 1989 states that working live should in the first instance should
26.
BS7671 gives guidance on the installation of electrical systems. Although it is not a statute document, it closely interprets
27.
Where a circuit feeds a socket outlet that incorporates an SPD it is recommended to?
28.
An insulation resistance test performed on a standard final circuit should be set to measure in
29.
The non-statutory document detailing the care and use of test instruments, leads and probes is
30.
During the initial verification of several machines within a large and busy factory unit, you run out of time to test the remaining ten before the night shift begins. What should be your course of action?
31.
The Zs reading taken on a motor circuit wired in steel conduit maybe lower than the Ze+(R1+R2) calculation due to
32.
Which of the following is NOT a scale commonly found on an RCD tester?
33.
Which of the following instruments would be used to measure the resistance of an earth electrode?
34.
When should an RCD trip when the setting of 5 times the rating of the RCD is used
35.
An existing single phase installation in the middle of London has 12 circuits protected by BS3036 fuses. A periodic inspection shows its Ze measured at 0.09Ω. What is potentially dangerous about this reading?
By Alan Rogers